Bowling pin reconditioning machine



Dec. 6, 1949 H. A. SCHUBERT BOWLING PIN RECONDITIONING MACHINE 2 Shets-Sheet 1 Filed March 6, 1947 I JNVENTOR. mw {W a? [764 r/r'my I Dec. 6, 1949 H. A. SCHUBERT BOWLING PIN RECONDITIONING MACHINE 2 Sheets-Sheet 2 Filed March 6, 1947 Patented Dec. 6, 1949 UNITED OFFICE BQWL G. B N t co imn Nm Me mNn; Herman A. schubertaWilmettg 111.; e Ji at m-M h 6, .7". ,Sgie b -332%? In the game of bowling the pins become dam a ed in a short time eitherby being struck by the a rby ach hen eneimu t he b c d by ew ic .-.,an Possi l da pins must be reconditioned either by resquaring the bottoms thereof, to insure, proper alignmentof the pins when setup, or. they must be resurfaced, or both.

The present method'of squaring the bottoms of e, pins is. to place them in. an ordinary wood working lathe, which usually requires-the services of a skilled workman, toinsureaccuratework. Such a methodisnotomi, time consuming but is expensive.

It is one of the objects of the, presentinvention to overcome these difiiculties and objections and to provide animproved machine for performing such workwhichdoes not require the attention of, or operatiomby a skilled me: chanic, but which will be simpleiand compact in construction, and efiective and eificient in op eraton.

A further object is to provide. an improved machine of this character, the work performing parts of which are continuous in operation, and which does not require the application of, and shutting oif of the power, when the pin is being placed into or removed from the machine, and with which machine the work is greatly accelerated from the methods now employed for recondit oning bowling pins.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of noveltyin substantially the construction, come bination, and arrangement of-the several parts, hereinafter'more fully-described and claimed and shown in the accompanying drawings, exemplifying this invent on, and-in which Figure 1 is a view in side elevationof a ma chine of this character embodying this invention, and with parts broken away.

Figure 2 is a detail sectional viewlon line 22, Figure 1 Figure 3 is a detail sectional viewvon line 3-3, Figure 1.

Figure 4 is a detail sectional view on lin 4-4, Figure 1.

Figure 5 is a detail fragmentary view showing the bottom of a bowling pin being. refinished.

Figure 6 is a detail sectional view showing the position of, the holding means for the pin while the pin is being removed from the machine.

F u s, a op plan iew t ken on. the line.- 1-1, Figure 1, with parts omitted.

2 Claims. (01.- 51-1241 Figur 8, s av i art in Side tionpa ili', g etieixagdl a tl r ke w y a mpsii e ,iogg iihe nven i ni ure. .,-aa a reed det sectional i ivp ine rtri re 8;.

Fig lel 19$? ad a l se iq al i w k n on th 9719i i ur s.-

Referring more particularly, to the drawings and to theformof the invent ion shown in Fig} ures l to the machine consists essentially ina supporting base. I ll which maybe anchored by means ot suitablear choring devices H, such as elts 1 he e.

A, motor "I2; is secured to the base by fasteng dcyices 43,, an connected to the motor shaft, so as ,to v lgotate a tanupright axis is an abrad-P ing or finishing deviceslich as ,a disc. Iii, which may be of any.suitable.diameter v and of -any.s,uit.- able construction, carrying, any suitablevabradnegia erial- Y T Risin from and supported bythe base. In is g pn nt 0;..coli1mn 1.5, which is also of. any desireddiameteriand length. A. bracketor sup: port idedmithspaced bearings lfi to receive the'npright I5, is slidably mounted there: upon and isia lsof adapted tobe swung about the upright as a pivot. One arn liil of the bracket is providedgwith, arr, opening I}, therethrough, of anyisuitiable configuration, to receive the lower end of a bowiingipin is, and so that the end la, will project therethroug h for any desired extent, the opening-1 LT; being disposed above the abradingldisc or eleinent- L4, so that when the bracketis raised onlowerediupon the upright l5, the end I8, M ,W rig; pin will be moved out of or into engagement the abrading element.

A holdingcap onmember [9, provided with a socket; 19 is. arranged within a housing 726 and isprovided with a stem 2|, that projects through the, top of thehousing, andpivotally connected tothestemoutside, oftthehousing as at 21* is a handle or operating lever 22, having an arm 23-, that isadapted; when the lever is turned in one direction about its pivot; to engage the housing wall (gliligur e 6), to dnaw the cap I9, into the hei ia atthe same im compressing the spring Zflathat encompasses the stem 2-! 'lihis housingand cap are. secured to the other. arm 16% in, any, suitable. manner, such as by ns ea ro ve a d t n u n ec n 6 2. and-fastening bolts, 25, secure these parts in such a mannerlthat if desired; the housing 2t! may be. vertically with respect to the arm Hie f; hebra et, ii, A washe 28 may, if desired be provided in the housing 20, to be engaged by the end of the arm 23, of the handle or lever 22.

A collar 29, is loosely fitted upon the upright I5, and is provided with a trunnion pin 30, which supports a block 34, which engages in a forked or slotted end 33, of a lever 32, the latter being pivotally mounted intermediate its ends upon a pivot pin 3|", that is secured to the bracket or support I5. When the lever 32, is moved about its pivot 3|, the block 34 will slide in the slot or bifurcation 33. Secured to the upright I5 on opposite sides of and in close proximity to the collar 29, are collars 35, secured against movement with respect to the upright, by means of suitable fastening devices 36, such as screws or the like, so that the collar 29, may be freely turned on the upright I5. These collars also serve as a means to anchor the collar 29, the block 34, and pivot 30 will then serve as a fulcrum for the lever 32. When the free end of the lever 32 is raised, the bracket or support I6 will also be raised, and when depressed, the bracket will also be lowered to lower the end of the bowling pin into contact with the abrading element I4.

Thus it will be seen that the abrading element may be continuously rotated, and when the bowling pin I8, is placed in the seat H, with the end It projecting therethrough, and with the bowling pin clamped or secured in this position with respect to the bracket I6, by means of the clamping or holding elements, I9, 20, 2| and 22, the bracket or support I6 may be lowered by the lever 32, to cause the end I8, of the pin to contact the abrading element I4 (see Figure 5). When the work is finished, the lever 32, is moved 'in the opposite direction to raise the bracket or support I6, to the position shown in Figure 1.

The lever 22, may then be operated or moved from the clamping position shown in Figure 1 to the unclamping position shown in Figure 6, to permit the bowling pin to be removed.

In the form of the invention shown in Figures 8 to there is provided a pulley 31, on the motor shaft over which an endless belt 38, passes, and said belt also passes over another pulley 39, disposed within a housing 40, which in turn is secured to the upright I5, by means of clamping means 4|, through the medium of a clamping bolt 42, or the like.

A friction clutch disc 43, is provided with a friction lining 44, which is adapted to engage a friction element 45, secured to the face of the pulley 39. A ball bearing 46, is fitted to a hub 48, carried by the housing 49 and secured in position by screws 49, and the bearing is held in position by engaging a shoulder 46 and a collar 41,

which latter engages a threaded portion on the hub 48. A shoulder 50, is provided in the housing against which another ball bearing 5Il engages and is held in position by the hub 48. A spring 5|, engages the bearing 50 and also presses against another and spaced ball bearing 52, and tends normally to hold the latter bearing against a shoulder 53 on a, sleeve 53. A shaft 54, passes through the bearing 52, spring 5|, bearing 50, hub 48, and to it is secured the clutch disc 43 so that the shaft will be rotated by the disc 43. when the latter is in frictional engagement with the pulley 39. The shaft 54, is provided with a collar 55, which takes the vertical thrust, and the end of the shaft beyond said collar passes through and beyond the end of the sleeve 53 Secured to the end of the shaft 54 is a knife disc 55, provided with knives 51, to engage the end of the bowling pin to hold it in operative connection with the shaft 54, the disc being fastened to the shaft in any suitable manner as by means of a pin or fastening device 58.

A brake disc 59, is supported by the top of the housing 49, by means of springs 60, held in position by means of tension bolts or members 6|. A friction disc or brake lining 62, may be provided on the disc 59, that may be engaged with a friction element 63, on the knife disc 56, the proper clearance between the friction elements 62 and 63 may be controlled by adjustments of the nuts of the tension springs 60. A lever 64, provided with a slot 65, in which a block 61 slides to allow for a certain rectilinear movement of the lever when the latter is moved up and down. A pin 66 is connected to the sleeve 53, that passes through a slot 66 in the housing 40, and engages the block 61 in the slot of the'lever 54, so that up and down movement of the lever will be imparted to the sleeve. A fulcrum pin 68, is carried by the housing 40, on a suitable stationary part of the machine, for the lever 64.

At the top of the upright or standard I5 is a holding cap or member 69, for maintaining the bowling pin in position, and is arranged within a housing I0, supported by a bracket I I, clamped in position by a fastening device or element I2. The housing I9, is fitted with ball bearings I3, 14 separated by a sleeve 15, and a collar I6, is fastened to the end of the shaft 69 on the cap 69. A cap TI, is provided for the housing I9, and is removably held in position by a suitable fastening device, such as. a screw I8.

It is thought the operation of this improved machine will be clearly understood from the foregoing description, but briefly stated it is as follows:

The damaged bOwling pin is placed into the seat I1, after the holding cap I9 has been moved to the position shown in Figure 6, by swinging the lever 22 about its pivot 2 I, as shown. When the bOWling pin is in this position the lever 22 is moved to the position shown in Figure l, and it will clamp the bowling pin and firmly hold it by the full pressure of the spring, 20 The motor I2, may then be operated and may be kept in operation as long as there is work to be done. With the bowling pin in its seat it may now be brought into contact with the abrading element I4, by operating the lever 32, in a downward direction towards the element I4, or the bowling pin may be moved sidewise, by swinging the bracket I6, about the upright or standard I5, as a pivot, as shown in Figure 5. As the motor I2, is rotated at a high rate of speed the work will be performed in a short time and no special skill will be required to move the bowling pin to and from the abrading element, which element is continuously rotated until the work is completed.

In case the upper surface or periphery of the bowling pin is to be refinished, then the machine illustrated in Figure 1, may be equipped with an additional fixture for rotating the bowling pin for working on such surface. By engaging the knife disc 55, with the brake disc 59, and disengaging the friction clutch element 43, from the pulley 39, this will permit seating of the bowling pin upon the knife edges 51, and the spring 5| will press the bowling pin against the holding cap 69. By moving the lever 54 upwardly will disengage the brake element 59 from the disc 63, and will raise the friction clutch disc 43, into engagement with the pulley 39, thereby causing the bowling pin to be rotated by the pulley 39,

through the medium of the shaft 54, and knife edge disc 56.

While the preferred forms of the invention have been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

1. In a machine for reconditioning a surface of a bowling pin, a supporting base, an upright, a motor driven abrading element upon the base, a bracket mounted upon the upright for movement lengthwise thereof above said abrading element and also about said upright as a pivot, there being an opening in the bracket forming a seat for the bowling pin through which one end of the bowling pin projects, means also on the bracket for engagement with the other end of the pin to clamp it in said seat, means for moving said bracket lengthwise of the upright and for swinging it about the upright as an axis, the last said means embodying a collar loosely mounted on the upright, fixed collars on opposite sides of the loose collar, a lever pivotally connected at one end to the loose collar, and a fulcrum for the lever on the said bracket.

2. In a machine for reconditioning a surface of a bowling pin, a supporting base, an upright, a motor driven abrading element upon the base, a bracket mounted upon the upright for movement lengthwise thereof above said abrading element and also about said upright as a pivot, there being an opening in the bracket forming a seat for the bowling pin through which one end of the bowling pin projects, means also on the bracket for engagement with the other end of the pin to clamp it in said seat, means for moving said bracket lengthwise of the upright and for swinging it about the upright as an axis, the last said means embodying a collar loosely mounted on the upright, fixed collars on opposite sides of the loose collar, a lever pivotally connected at one end to the loose collar, and means pivotally connecting said lever intermediate its ends to the said bracket whereby to form a fulcrum for the lever.

HERMAN A. SCHUBERT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 797,991 Van Mater Aug. 22, 1905 1,576,448 Mudra Mar. 9, 1926 1,616,909 Lorenz et a1. Feb. 8, 1927 1,644,530 Johnson Oct. 4, 1927 1,794,149 Collins Feb. 24, 1931 1,832,101 Decker Nov. 17, 1931 1,852,736 Connell Apr. 5, 1932 2,038,422 Decker Apr. 21, 1936 2,205,541 Pizzotti June 25, 1940 2,363,899 Phillips Nov. 28, 1944 

